/**
* PermissionsEx
* Copyright (C) zml and PermissionsEx contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ninja.leaping.permissionsex.util.glob;
import ninja.leaping.permissionsex.util.glob.parser.GlobParser;
import ninja.leaping.permissionsex.util.glob.parser.GlobParserBaseListener;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.List;
class GlobListener extends GlobParserBaseListener {
private final Deque<List<GlobNode>> children = new ArrayDeque<>();
public GlobNode popNode() {
List<GlobNode> children = this.children.pop();
if (children.size() == 1) {
return children.get(0);
} else {
return new SequenceNode(children);
}
}
@Override
public void enterGlob(GlobParser.GlobContext ctx) {
super.enterGlob(ctx);
children.push(newList());
}
@Override
public void exitGlob(GlobParser.GlobContext ctx) {
super.exitGlob(ctx);
if (children.size() > 1) {
GlobNode toAdd = popNode();
children.peek().add(toAdd);
}
}
@Override
public void enterOr(GlobParser.OrContext ctx) {
super.enterOr(ctx);
children.push(newList());
}
@Override
public void exitOr(GlobParser.OrContext ctx) {
super.exitOr(ctx);
GlobNode toAdd = new OrNode(children.pop());
children.peek().add(toAdd);
}
@Override
public void exitLiteral(GlobParser.LiteralContext ctx) {
super.exitLiteral(ctx);
children.peek().add(Globs.literal(ctx.getText()));
}
private static List<GlobNode> newList() {
return new ArrayList<>();
}
}